The 2006 Lebanon War, also called the 2006 Israel-Hezbollah War and known in Lebanon as the July War (Arabic: حرب تموز‎, Ḥarb Tammūz) and in Israel as the Second Lebanon War (Hebrew: מלחמת לבנון השנייה‎, Milhemet Levanon HaShniya), was a 34-day military conflict in Lebanon, northern Israel and the Golan Heights. The principal parties were Hezbollah paramilitary forces and the Israeli military. The conflict started on 12 July 2006, and continued until a United Nations-brokered ceasefire went into effect in the morning on 14 August 2006, though it formally ended on 8 September 2006 when Israel lifted its naval blockade of Lebanon.

The conflict began when militants from the group Hezbollah fired rockets at Israeli border towns as a diversion for an anti-tank missile attack on two armored Humvees patrolling the Israeli side of the border fence. The ambush left three soldiers dead. Two additional soldiers, believed to have been killed outright or mortally wounded, were taken by Hezbollah to Lebanon. Five more were killed in a failed rescue attempt. Israel responded with airstrikes and artillery fire on targets in Lebanon that damaged Lebanese civilian infrastructure, including Beirut's Rafic Hariri International Airport, an air and naval blockade, and a ground invasion of southern Lebanon. Hezbollah then launched more rockets into northern Israel and engaged the Israel Defense Forces (IDF) in guerrilla warfare from hardened positions.

The term Lebanon War can refer to any of the following wars, fought in Lebanon:

Lebanon (ⁱ/ˈlɛbənɒn/ or /ˈlɛbənən/; Arabic: لبنان‎ Libnān or Lubnān, Lebanese Arabic: [lɪbˈneːn]), officially the Lebanese Republic (Arabic: الجمهورية اللبنانية‎ al-Jumhūrīyah al-Libnānīyah, Lebanese Arabic: [elˈʒʊmhuːɾɪjje l.ˈlɪbneːnɪjje]), is a country in the East Mediterranean. It is bordered by Syria to the north and east, and Israel to the south. Lebanon's location at the crossroads of the Mediterranean Basin and the Arabian hinterland has dictated its rich history, and shaped a cultural identity of religious and ethnic diversity.

The earliest evidence of civilization in Lebanon dates back more than 7,000 years—predating recorded history. Lebanon was the home of the Phoenicians, a maritime culture that flourished for nearly 2,500 years (3000–539 BC). Following the collapse of the Ottoman Empire after World War I, the five provinces that comprise modern Lebanon were mandated to France. The French expanded the borders of Mount Lebanon, which was mostly populated by Maronite Catholics and Druze, to include more Muslims. Lebanon gained independence in 1943, and established a unique political system, known as confessionalism, a power-sharing mechanism based on religious communities – Bechara El Khoury who became independent Lebanon's first President and Riad El-Solh, who became Lebanon's first prime minister, are considered the founders of the modern Republic of Lebanon and are national heroes for having led the country's independence. French troops withdrew from Lebanon in 1946.